A young boy once went to the circus and was astonished when he saw a giant elephant tethered to the ground by a thin rope. Curious, he walked over to the elephant trainer and asked: “How are you holding down such a huge elephant with such a tiny rope? The rope doesn’t look very strong. This elephant could break down a brick wall; why doesn’t he break free of this tiny rope?” The trainer smiled at him and explained: “When this elephant was a baby, weighing just 250 pounds, we tied it up with this same rope. Every day he tried to break free, but he couldn’t manage to do it. He tried and tried, but to no avail. After a few months, he finally gave up, convinced that it was impossible to escape. Now, he weighs eight thousand pounds and is strong enough to easily break free of these ropes. However, in his mind, he is still chained by an unbreakable rope, so he doesn’t even try to escape.”